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Acoustic stack for combined intravascular ultrasound and photoacoustic imaging.

Acoustic stack for combined intravascular ultrasound and photoacoustic imaging.

Authors :
Lopez-Marin A
Daeichin V
Hunt A
Springeling G
Beurskens R
Van der Steen AFW
Van Soest G
Source :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control [IEEE Trans Ultrason Ferroelectr Freq Control] 2024 Sep 23; Vol. PP. Date of Electronic Publication: 2024 Sep 23.
Publication Year :
2024
Publisher :
Ahead of Print

Abstract

Multimodal intravascular ultrasound and photoacoustic (IVUS/PA) imaging is a promising diagnostic tool for cardiovascular diseases like atherosclerosis. IVUS/PA catheters typically require two independent transducers due to different frequency requirements, potentially increasing the catheter size. To facilitate multimodal imaging within conventional catheter dimensions, we designed, fabricated, and characterized a dual-transducer acoustic stack where a low-frequency (LF) PA receiver sits as a matching layer for the high-frequency (HF) US transducer. While the HF transducer operates around 50 MHz, the LF receiver targets frequencies below 15 MHz to capture most of the PA energy from atherosclerotic plaque lipids. Simulation results reveal that this configuration could increase the sensitivity of the HF transducer by 3.54 dB while maintaining bandwidth. Phantom experiments with fabricated stacks showed improved performance for the US transducer, validating the enhanced sensitivity and bandwidth. Following improvements in stack fabrication, the proposed acoustic stack is a viable design that can significantly enhance diagnostic accuracy for atherosclerosis, providing high-resolution, multifrequency imaging within a compact catheter form factor.

Details

Language :
English
ISSN :
1525-8955
Volume :
PP
Database :
MEDLINE
Journal :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Publication Type :
Academic Journal
Accession number :
39312431
Full Text :
https://doi.org/10.1109/TUFFC.2024.3465837